<template>
	<div>
		<!--面包屑导航区域-->
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>商品管理</el-breadcrumb-item>
			<el-breadcrumb-item>添加商品</el-breadcrumb-item>
		</el-breadcrumb>
		<!--卡片视图区域-->
		<el-card>
			<!--提示区域-->
			<el-alert title="添加商品信息" type="info" center show-icon :closable="false">
			</el-alert>
			<!--步骤条区域-->
			<el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
				<el-step title="基本信息"></el-step>
				<el-step title="商品参数"></el-step>
				<el-step title="商品属性"></el-step>
				<el-step title="商品图片"></el-step>
				<el-step title="商品内容"></el-step>
				<el-step title="完成"></el-step>
			</el-steps>
			<!--tab栏区域-->
			<el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
				<el-tabs :tab-position="'left'" v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabClicked">
					<el-tab-pane label="基本信息" name="0">
						<el-form-item label="商品名称" prop="goods_name">
							<el-input v-model="addForm.goods_name"></el-input>
						</el-form-item>
						<el-form-item label="商品价格" prop="goods_price">
							<el-input v-model="addForm.goods_price" type="number"></el-input>
						</el-form-item>
						<el-form-item label="商品重量" prop="goods_weight">
							<el-input v-model="addForm.goods_weight" type="number"></el-input>
						</el-form-item>
						<el-form-item label="商品数量" prop="goods_number">
							<el-input v-model="addForm.goods_number" type="number"></el-input>
						</el-form-item>
						<el-form-item label="商品分类" prop="goods_cat">
							<el-cascader v-model="addForm.goods_cat" :options="catelist" :props="{ expandTrigger: 'hover',label:'cat_name',value:'cat_id',children:'children' }" @change="handleChange" clearable></el-cascader>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品参数" name="1">
						<el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
							<!--复选框组-->
							<el-checkbox-group v-model="item.attr_vals">
								<el-checkbox border :label="cb" v-for="(cb,i) in item.attr_vals" :key="i"></el-checkbox>
							</el-checkbox-group>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品属性" name="2">
						<el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
							<el-input v-model="item.attr_vals"></el-input>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品图片" name="3">
						<!--action表示图片要上传到的后台api地址-->
						<el-upload :action="uploadUrl" :headers="headerObj" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :on-success="handleSuccess">
							<el-button size="small" type="primary">点击上传</el-button>
						</el-upload>
					</el-tab-pane>
					<el-tab-pane label="商品内容" name="4">
						 <quill-editor v-model="addForm.goods_introduce"></quill-editor>
						 <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
					</el-tab-pane>
				</el-tabs>
			</el-form>
		</el-card>
		<!--图片预览-->
		<el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
			<img :src="previewPath" class="previewImg"/>
		</el-dialog>
	</div>
</template>

<script>
	import _ from 'lodash'
	export default {
		data() {
			return {
				activeIndex: '0',
				addForm: {
					goods_name: "",
					goods_price: 0,
					goods_weight: 0,
					goods_number: 0,
					goods_cat: [],
					//图片的数组
					pics: [],
					//商品的详情描述
					goods_introduce:"",
					attrs:[]
				},
				addFormRules: {
					goods_name: [{
						required: true,
						message: "请输入商品名称",
						tigger: "blur"
					}],
					goods_price: [{
						required: true,
						message: "请输入商品价格",
						tigger: "blur"
					}],
					goods_weight: [{
						required: true,
						message: "请输入商品重量",
						tigger: "blur"
					}],
					goods_number: [{
						required: true,
						message: "请输入商品数量",
						tigger: "blur"
					}],
					goods_cat: [{
						type: 'array',
						required: true,
						message: "请选择商品分类",
						tigger: "blur"
					}]
				},
				catelist: [],
				//				动态参数列表数组
				manyTableData: [],
				//				静态属性列表数组
				onlyTableData: [],
				//上传图片的url地址
				uploadUrl: "http://127.0.0.1:8888/api/private/v1/upload",
				//图片上传组件的headers请求头对象
				headerObj: {
					Authorization: window.sessionStorage.getItem("token")
				},
				previewPath: "",
				previewVisible:false
			}
		},
		computed: {
			cateId() {
				if(this.addForm.goods_cat.length === 3) {
					return this.addForm.goods_cat[2]
				} else {
					return null
				}
			}
		},
		created() {
			this.getCateList();
		},
		methods: {
			//获取所有商品分类数据
			async getCateList() {
				var {
					data: res
				} = await this.$http.get("categories");
				if(res.meta.status !== 200) {
					return this.$message.error("获取商品分类失败！")
				}
				this.catelist = res.data;
			},
			//级联选择器选中项变化触发函数
			handleChange() {
				if(this.addForm.goods_cat.length !== 3) {
					this.addForm.goods_cat = [];
				}
			},
			beforeTabLeave(activeName, oldActiveName) {
				if(oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
					this.$message.error("请选择商品分类!")
					return false
				}
			},
			async tabClicked() {
				//				证明访问的是动态参数面板
				if(this.activeIndex === "1") {
					const {
						data: res
					} = await this.$http.get(`categories/${this.cateId}/attributes`, {
						params: {
							sel: "many"
						}
					})
					if(res.meta.status !== 200) {
						return this.$message.error("获取动态参数列表失败！")
					}
					res.data.forEach(item => {
						item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ")
					})
					this.manyTableData = res.data;
				} else if(this.activeIndex === "2") {
					const {
						data: res
					} = await this.$http.get(`categories/${this.cateId}/attributes`, {
						params: {
							sel: "only"
						}
					})
					if(res.meta.status !== 200) {
						return this.$message.error("获取静态属性列表失败！")
					}
					//					res.data.forEach(item => {
					//						item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ")
					//					})
					//					console.log()
					this.onlyTableData = res.data;
				}
			},
			//处理图片预览效果
			handlePreview(file) {
				this.previewPath = file.response.data.url;
				this.previewVisible=true;
			},
			//处理移除图片的操作
			handleRemove(file) {
				const filePath = file.response.data.temp_path;
				const i = this.addForm.pics.findIndex(item => {
					item.pic == filePath
				})
				this.addForm.pics.splice(i, 1);
			},
			//监听图片上传成功的事件
			handleSuccess(res) {
				this.addForm.pics.push({
					pic: res.data.tmp_path
				});
			},
//			添加商品
			add(){
				this.$refs.addFormRef.validate(async valid=>{
					if(!valid){
						return this.$message.error("请填写必要的表单项！")
					}
					//lodash cloneDeep(obj)  深拷贝
					const form=_.cloneDeep(this.addForm);
					form.goods_cat=form.goods_cat.join(",");
					//处理动态参数
					this.manyTableData.forEach(item =>{
						const newInfo={attr_id:item.attr_id,attr_value:item.attr_vals.join(" ")};
						this.addForm.attrs.push(newInfo);
					})
					//处理静态属性
					this.onlyTableData.forEach(item =>{
						const newInfo={attr_id:item.attr_id,attr_value:item.attr_vals};
						this.addForm.attrs.push(newInfo);
					})
					form.attrs=this.addForm.attrs;
					//发起请求
					//商品名称必须唯一
					var {
						data: res
					} = await this.$http.post("goods",form);
					if(res.meta.status !== 201) {
						return this.$message.error("添加商品失败！");
					}
					this.$message.success("添加商品成功！");
					this.$router.push("/goods");
				})
			}
		}
	}
</script>

<style lang="less" scoped>
	.el-checkbox {
		margin: 0 10px 0 0 !important;
	}
	.previewImg{
		width: 100%;
	}
	.btnAdd{
		margin-top: 15px;
	}
</style>